Binder attachment for sewing machines



.Oct. 14, 1947. J.'E. AcKERMAN 2,423,952

BINDER nmcnusm FOR smwme MACHINES Filed July 23, 1945 20 J1 INVENTORATTORNEY Patented Oct. 14, 1947 nmnsn-A rmcnm NT iron sovm' c MACHINESJames "Acker man Devon, Conn assignorto "The Singer ManufacturingCompany, Elizabetl'nNL I facorporation of'NewJerse AppIicatioHJUIyZQ,1945;:Serial No.r606;'63;7

7. Claims.

This invention relates to binders; for use with,

I shell-memberIZ. The. lower limb l3'of theshellsewing machinesandmoreparticularly to binders of: the strip-inverting type- The inventionhas for its-object to provide a improved strip -inverting and edgeinturning binder that will permit ready insertion therein,

of the binding-strip and which will permit drawing therethrough of thestrip with a minimum of applied force.

The invention both in structure and in operation, as well as toadditional objects thereof, will;

be best understood from the followingdescription taken in conjunctionwith the accompanying drawings in which:

Fig. 1 is a perspective view of the improved hinder loaded with, abinding-strip.

Fig.2 is a top plan view of the binder.

Fig. 3 is --a front side elevation of the binder.

Fig. 4 is an end elevation of the strip-receiving end of the binder. I VFig. 5 is a front end elevation of the stripegress end of the binder.

Fig. 6 is. a, rear side elevation of the binder.

Fig. 7 is a. sectional view taken substantially along line 7-! offFig.3.

Fig. 8 is a. sectional view taken substantially along line '8-8 of 'Fig-3.

As, shown in. the accompanying drawings, the improved binder has anL-shaped supporting plate I provided witha slot '2 elongated lengthwiseof the binder. an upturned portion 3 t'o which the'inne'r or coremember4 of the binder isv secur'ed'by screwsf5.

Thecore-member' lcomprises a block formed to provide an outer guide-wallof substantially horizontal U-shape. 6 of the core-member guide-wall isdisposed slightly below the upper edge'of and extends to the verticalwall portion 1 'ofthe core rib 8,

whereby the wall portion 1 may serve as a guide The supporting plate Ihas member 12. is-disposed in binding-strip confining relation withtherib I'I ofthe-core-member; said lower limb I3 extending under saidrib -II and being'be-nt upwardly to be suitably attached to the backside ofthe core-member 5,-asby screws I4. The forward receiving endportion, of the shell-member I 2' is flared outwardly as at I5thereby-to facilitate the insertion of the bindingstri-pbetween the core4 and the shell-member I2.

The forward portion of the upper limb of the -shell-member ispartly cutaway at'an inclination The upper horizontal face 1 for the upper'marginof a binding strip B. The

wall portion 1 deflects the upper marginal portion of the stripvertically upwardly. 'As illustrated more particularly in Fig. 7 of thedrawings,

the lower core-"member face 9, Which is disposed substantiallyparalleltothe upper face 6, termimates in a vertical shoulder Ii! formed by a ribII depending from the core-member 4 adjacent the supporting-plate member3. The rib Ilpreferably extends throughout the length of the corememberand the shoulder I 0 of the rib I I provides an edge-guide for the lower"edge of "the binding-strip B.

V Spaced from the core-member 4 to form therewith a horizontal U-shapedchannel for t h'e bind;- "ing-strip B isia correspondingly shapedouteror relation with the rib 8. I terminates substantially at theedge-guide 2.0 of the core-member 4 which is cut away and recessed tothelength of the binder and terminates approximately midway of thebinder-length in a strip-margin engaging ear bent to provide avertically disposed wall portion I6 and a horizontally disposed wallportion H, which latter is secured by a screw i8 to the top surface. oftherib 8. This ear cooperates with the core Wall portion 1 in confiningand in guiding the vertically upwardly directedmargin of the strip B.The upper limb of the shell-member continues beyond the ear IE to form afold-defining shell-edge portion IH'Which is spaced from and disposed inparallel The shell-member I2 to form the conventionally inclined andspaced strip-inverting edges 2| and 2-2, and to provide a body materialedge-guide 28 between said edges.

Secured by screws 23 upon the upper face of the rib 8, at thestrip-delivery side of the ear '8, is a fold-forming plate 24. The plate24 overhangs the shell-ed e I9 and is provided with a strip-folding edge25 which 'isinclined away from the rib -8 in a direction toward thedelivery end of the binder. As may be best seen from Figs. 3, 5 and 6,the free edge portion of the plate 24 is bent downwardly into contactwith the shell I2 to form a depending strip-confining guide wall 26which functions as a guide for the folded margin of the strip. Thedepending wall 25 is bent to curve about and to completely house theupper strip-delivery portion of the binder; said wall 26 being spacedfrom the strip-inverting edge 21 binder, the forward end portion of thestrip is merely inserted between the shell edge I5 and the core 4; theedge of the upper margin being deflected upwardly by the Wall 1 andbeing guided by the wall ll, while the edge of the lower margin isguided by the shoulder H] of the coremember rib ll. As the binding-stripis passed through the binder, the upper margin of the strip is held in avertical position by the wall l6 until the strip is deflected outwardlyand away from the plane of the rib-wall l by the strip-folding edge 25which thereafter folds the marginal portion downwardly upon the upperface of the shell-member I2. It has been found to be advantageous toconstruct the U-shaped strippassageway with an angularly disposed orVertical limb defined by the rib-Wall I and the shellwall 16 (Fig. 8),for the reason that the marginal portion of the binding strip B guidedby this limb is folded back through 90 degrees only as it passes fromthe receiving end of the attachment to the strip-inverting edge 2|thereof. The folding back of the binding strip through only 90 degrees,instead of through 180 degrees as in previous attachments of this type,reduces to a minimum the applied force necessary to draw the bindingstrip through the attachment. Also, the marginal portion of the bindingstrip which traverses the vertical portion of the strip-passageway isnot subjected to as much stretch when it is bent through 90 degrees asit is when it is bent through 180 degrees, with the result that thebinding strip is delivered to the stitching mechanism in a substantiallyunstretched condition. The finished seam consequently lies flat and isdevoid of waviness.

The binding-strip is then inverted about thF. core-member edges 2| and22 in the conventionaI manner, thereby inturning the folded margin ofthe strip; the depending wall 26 of the plate 24, together with the edgeportion 29 of the angleplate 23 suitably confining and guiding thestrip. The wall 26 further functions as a guard for pile or other loosethreads upon the upper face of a 7 body material to which thebinding-strip is to be attached.

Having thus set forth the nature of the invention, what I claim hereinis:

1. A strip-reversing binder for sewing machines, comprising, acore-member widthwise formed to provide a U-shaped outer guide-wallhaving substantially parallel outer side faces and lengthwiseterminating in an inclined strip-inverting edge, a rib projectinsubstantially at right angles from one of said side faces and extendinglongitudinally of said core-member, an outer shell-member formed anddisposed with respect to said core-member to provide therebetween aU-shaped strip-folding channel, said shell-member having a fold-definingside edge thereof disposed adjacent the juncture of said rib and saidcore-member side face at the foldinverting end of the core-member, astrip-margin.

folding plate carried by said rib and overhanging said fold-definingedge of the shell-member, and a strip-margin engaging member carried bysaid shell between said plate and the strip-receiving end of saidbinder, said strip-margin engaging member being formed and disposed withrespect to said rib to provide therebetween a straight strip-guidingchannel disposed at an angle to the upper limb of and communicating withsaid U- shaped channel,

2. A strip-reversing binder for sewing machines, comprising, acore-member widthwise shell-member having a fold-defining side edgethereof disposed adjacent the juncture of said rib and said core-memberside face at the foldinverting end of the core-member, a strip-marginengaging member carried by said shell at a point remote from thefold-inverting end of the coreinember, said strip-margin engaging memberbeing formed and disposed with respect to said rib to providetherebetween a straight stripguiding channel disposed at an angle to andcommunicating with said U-shaped channel, and a strip-margin foldingplate carried by said rib and overhanging said fold-defining edge of theshell-member between said strip-margin engaging member and said inclinedstrip-inverting edge of the core-member, said plate having a free edgethereof inclined away from said rib at the point of termination of saidstrip-margin engaging member and toward the delivery end of the binderto overhang said shell-member.

3. A strip-reversing binder for sewing machines, comprising, acore-member widthwise formed to provide a U-shaped outer guide-wallhaving substantially parallel outer side faces and lengthwiseterminating in a notched strip-delivery mouth providing spacedstrip-inverting edges inclined to the longitudinal axis of thecore-member, a rib projecting substantially at right angles from one ofsaid side faces and extending longitudinally of said core-member, anouter shellmember formed and disposed with respect to said core-memberto provide therebetween a U-shaped strip-folding channel, saidshell-member having a fold-defining side edge thereof disposed adjacentthe juncture of said rib and said core-member side face at thefold-inverting end of the core-member, a strip-margin folding platecarried by and disposed substantially at right angles to said rib andoverhanging said fold-defining edge of the shell-member, and astrip-confining guide-wall depending from said strip-margin foldingplate in spaced relation with one of said strip-inverting edges toprovide therebetween a guide channel for the underfolded margin of thebinding strip.

4. A strip-reversing binder for sewing machines, comprising, acore-member widthwise formed to provide a U-shaped outer guide-wallhaving substantially parallel outer side faces and lengthwiseterminating in a notched strip-delivery mouth providing spacedstrip-inverting edges inclined to the longitudinal axis of thecore-member, a rib projecting substantially at right angles from one ofsaid side faces and extending longitudinally of said core-member, anouter shell-member formed and disposed with respect to said core-memberto provide therebetween a U-shaped strip-folding channel, saidshell-member having a fold-defining side edge thereof disposed adjacentthe juncture of said rib and said core-member side face at thefoldinverting end of the core-member,a strip-margin folding platecarried by and disposed substantially'at right angles to said rib andoverhanging said fold-defining edge of the shell-member, astrip-confining guide-wall depending from said strip-margin foldingplate in spaced relation with one of said strip-inverting edges toprovide therebetween a guide channel for the under-folded margin of thebinding strip, and a strip-margin engaging member carried by said shellat a point remote from the fold-inverting end of the coremember, saidstrip-margin engaging member being formed and disposed with respect tosaid rib to provide therebetween a straight strip-guiding channel whichcommunicates with said U-shaped channel and which terminates adjacentthe juncture of said rib and said margin folding plate.

5. A strip-reversing binder for sewing machines, comprising, acore-member widthwise formed to provide a U-shaped outer guide-wallhaving substantially parallel outer side faces and lengthwiseterminating in a notched strip-delivery mouth providing spacedstrip-inverting edges inclined to the longitudinal axis of thecore-member, a rib projecting substantially at right angles from one ofsaid side faces and extending longitudinally of said core-member, anouter shell-member formed and disposed with respect to said core-memberto provide therebetween a U-shaped strip-folding channel, saidshell-member having a fold-defining side edge thereof disposed adjacentthe juncture of said rib and said core-member side face at thefold-inverting end of the core, a strip-margin folding plate carried byand disposed substantially at right angles to said rib and overhangingsaid fold-defining edge of the shell-member, said plate having a freeedge thereof inclined away from said rib and toward the delivery end ofthe binder to overhang said shell-member, a strip-confining guide-walldepending from said strip-margin folding plate in spaced relation withone of said strip-inverting edges to provide therebetween a guidechannel for the underfolded margin of the binding strip, and astrip-margin engaging member carried by said shell at a point remotefrom the delivery end of the binder, said strip-margin engaging memberbeing formed and disposed with espect to said rib to providetherebetween a straight strip-guiding channel which communicates withsaid U-shaped channel and which terminates adjacent the juncture of saidrib and the inclined free edge of said strip-margin folding plate.

6. A strip-reversing binder for sewing machines, comprising, acore-member having a U- shaped outer guide-wall and having a notchedstrip-delivery mouth providing spaced strip-inverting edges inclined tothe longitudinal axis of the core-member, said core-member havingsubstantially parallel side faces each provided at the side edge thereofremote from the bend of said guide-wall with a rib extendinglongitudinally of the core-member, a first one of said ribs forming 6 abinding-strip edge-guide and the second one of said ribs projectingsubstantially at right angles from one of said side faces, a U-shapedshellmember disposed with respect to said core-member to form therewitha U-shaped strip-doubling channel, said shell-member having one limbdisposed in strip-confining relation with said first rib and having itsother limb terminating in a folddefining side edge disposed adjacent thejuncture of said second rib and said core side face, a stripmarginengaging member carried by said shell and formed and disposed withrespect to said second rib to provide therebetween a straightstrip-guiding channel which communicates With said U-shaped channel, astrip-margin folding plate carried by and disposed substantially atright angles to said second rib and overhanging said fold-defining edgeof the shell-member at a point between the delivery end of thecore-member and said strip-margin engaging member, said plate having afree edge thereof inclined away from said second rib and toward thedelivery end of the binder to overhang said shell-member, and astrip-confining guide-wall depending from said strip-margin foldingplate in spaced relation with one of said strip-inverting edges toprovide therebetween a guide channel for the underfolded portion of thebinding strip.

7. A strip-reversing binder for sewing machines, comprising, acore-member having a U- shaped wall terminating endwise of the binder ina notched strip-delivery mouth providing spaced strip-inverting edgesinclined to the longitudinal axis of said core-member, said wallterminating widthwise of the binder in oppositely directed guide-ribssubstantially normal to the wall and extending longitudinally of thecore-member, a U-shaped shell-member disposed with respect to saidcore-member to form therewith a U-shaped strip-doubling channel, a plateextending from one of said ribs and overhanging an edge portion of saidshell-member in proximity to the stripdelivery end of the binder, saidplate having a strip-margin foldin edge inclined to the length of thebinder and terminating in an edge-guiding flange depending from saidplate into contact with said shell-member, and said flange being bentabout one of the strip-inverting edges of said core-member in spacedrelation thereto.

JAMES E. ACKERMAN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

